package com.itheima.service.imgl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomerException;
import com.itheima.mapper.CategoryMapper;

import com.itheima.pojo.Category;

import com.itheima.pojo.Dish;
import com.itheima.pojo.Setmeal;
import com.itheima.service.CategoryService;

import com.itheima.service.DishService;
import com.itheima.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {


    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    /**
     * 根据id删除分类，删除之前需要进行判断
     */
    @Override
    public void remove(Long id) {
        //1. 添加查询条件，根据分类id进行查询菜品数据
        QueryWrapper<Dish> queryWrapper1 = new QueryWrapper<>();
        queryWrapper1.eq("category_id",id);
        int count1 = dishService.count(queryWrapper1);
        //如果已经关联，抛出一个业务异常
        if (count1 > 0) {
            throw new CustomerException("当前分类下关联了菜品，不能删除");
        }

        //2. 查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        QueryWrapper<Setmeal> queryWrapper2 = new QueryWrapper<>();
        queryWrapper2.eq("category_id", id);
        int count2 = setmealService.count(queryWrapper2);
        //如果已经关联，抛出一个业务异常
        if (count2 > 0) {
            throw new CustomerException("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常
        }
        //3. 正常删除分类
        this.removeById(id);
    }
}
